JPH02123014A - Screw feeder - Google Patents

Abstract

PURPOSE:To make internal cleaning simply and sure by coupling a drive shaft with a cylindrical body in which the drive shaft is inserted and to which a screw blade is mounted with free engagement/disengagement and arranging a bearing for the drive shaft at the top of a transportation pipe attachably/ detachably. CONSTITUTION:When cleaning is performed, a bolt 18 is taken off from a drive shaft 6, and a bearing case 21 is taken off therefrom together with a clamp cylinder 16 and a short shaft 17. Then a cylindrical body 7 is taken off and a screw blade 8 is cleaned up. The inner part of a transportation pipe 2 is cleaned up from the supply pipe 4 and exhaust pipe 5 sides and also from the opening installation side of a bearing member 15. After completion of cleaning they are assembled in a reverse order. In this constitution, the internal cleaning is made simple and sure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a screw feeder, and particularly to a screw feeder for transporting powder transport materials such as foods, medical products, and medical drugs.

[Conventional technology]

A so-called sanitary screw feeder is required for the screw feeder used for transporting the above-mentioned foods, etc., which is cleaned and kept clean each time it is used. An example is shown in FIG.

This screw feeder 50 houses a screw 52 in a transport pipe 51, and has a supply pipe 53 at one end of the transport pipe 51, and a discharge pipe 54 at the other end.

55 is a screw drive motor.

The transport pipe 51 is composed of a main body 56 and a lower casing 57 forming approximately the lower half, and the lower casing 57 is detachably attached to the main body 5G with a fastener 58 such as a wing nut.

When cleaning the inside of this product, the lower casing must be removed and accessed from below.

[Problems to be Solved by the Invention] However, even if the lower casing 57 is removed, it is difficult to remove the screw and the transported objects stuck to the inner wall of the upper part of the main body, which is a blind spot due to the screw, and complete cleaning is not desired.

In view of this, an object of the present invention is to provide a screw feeder whose interior can be cleaned easily and reliably.

[Means to solve the problem]

A first invention for achieving the above object is that the screw includes a drive shaft connected to a drive motor, and a cylindrical body into which the drive shaft is inserted and a screw blade is attached, and an engagement/disengagement mechanism is provided between the two. A bearing member for supporting the drive shaft tip is removably attached to the tip of the transport tube.

In this case, it is preferable that the engagement/disengagement mechanism connects the drive shaft between the prism and the elbow, and a key having a semicircular cross section that fits into the gap between the prism and the prism is attached inside the cylindrical body.

In a second aspect of the invention, a cleaning liquid injection pipe is removably provided at a suitable position on the transport pipe.

In a third aspect of the invention, an opening/closing valve is attached to the discharge pipe attached to the outlet side of the transport pipe, and cleaning liquid supplied into the transport pipe is stored and discharged by opening and closing the valve.

In the first aspect of the invention, the transport pipe may be provided with a cleaning liquid injection pipe in a removable manner at a suitable location.

Furthermore, in the first invention, an on-off valve may be attached to the discharge pipe of the transport pipe, and the cleaning liquid supplied into the transport pipe may be stored and discharged by opening and closing the valve.

[For production]

According to the first aspect of the invention, the bearing member supporting the tip of the drive shaft of the screw is removed, and the cylindrical body to which the screw blades are attached is exposed to the top and cleaned. The inside of the transport pipe is accessed through the tip opening, material supply port, and discharge port.

Further, in the second aspect of the invention, a cleaning liquid injection mechanism is attached after the operation is stopped, and the cleaning liquid is injected into the inside for cleaning.

According to the third aspect of the invention, the opening/closing damper is closed, and after the cleaning liquid is supplied and stored inside, it is discharged.

Repeat this pool washing operation.

Note that the first and second aspects of the invention may be combined, the screw blades being taken out and cleaned, and the inside of the transport pipe being pre-cleaned by spraying the i-precleaning 1α.

Moreover, the first and third inventions are combined, the screw blade is taken out and washed, the transport pipe is provided with a blind stopper at the tip opening, and the opening/closing damper is opened and closed for cleaning. Purification may be carried out by washing the '4 IF reservoir.

〔Example〕

1 to 4 show a first embodiment. The screw feeder 1 includes a transport pipe 2 and a screw 3 housed therein. The transport pipe 2 has a transport material supply pipe 4 at the top of one end,
In addition, a discharge pipe 5 is attached to the lower part of the other side.

Further, the screw 3 is fitted into the drive shaft 6, and
A cylindrical body 7 equipped with a feeding screw blade 8 on the outer periphery.
The drive shaft 6 is connected to the drive motor 11 via the coupling 10)! Continued. 12 is a support bearing on the drive motor side of the drive shaft 6.

An engagement/disengagement mechanism 13 is provided between the inner hole of the cylindrical body 7 and the drive shaft 6. In the figure, as an example, the drive shaft 6 is a square prism, and keys 14 in the shape of a half moon (split circle) are attached to the inner surfaces of both sides of the cylindrical body 7, which fit into the gaps between the drive shaft and the drive shaft.

Reference numeral 15 denotes a bearing member which is removably attached to the tip of the transport pipe 2. A clamp tube 16 in the shape of a short cylinder with a bottom that fits on the tip of the drive shaft 6 and a short shaft 17 are connected by a bolt 18, and the clamp The tip of the cylinder 16 contacts the cylinder 7, and the cylinder 7 is held in contact with the inner tube 19 fitted to the drive shaft 6 of the support bearing 12. A bearing 20 is interposed between the short shaft 17 and the hair ring case 21, and the hair ring case 21 is removably attached to a mounting flange 22 attached to the tip of the transport pipe 2. 2
3 is a gasket for maintaining airtightness.

In the above configuration, when cleaning the screw feeder 1, the iKle 1B is removed from the drive shaft 6, and the hair ring case 21 is removed together with the clamp tube 16 and the short shaft 17. This makes it possible to take out the cylindrical body 7, and the screw blade 8 is cleaned by taking it out. Further, the inside of the transport pipe 2 is cleaned by appropriate means from the mounting side of the bearing member 15, which opens from the supply pipe 4 and discharge pipe 5 sides. On this occasion,
Inside the transport pipe 2, only the drive shaft 6 remains at the center position, and cleaning is easy.

Assembly can be done in the reverse order.

Next, FIGS. 5 to 7 show a second embodiment.

The screw feeder 30 includes a transport pipe 31 and a screw 32 housed in the transport pipe 31 as in the previous example. 33 is a material supply pipe attached to the upper part of one end of the transport pipe 31, 34 is a discharge pipe attached to the lower part of the other side, and 35 is a screw drive miller.

A plurality of injection pipe attachment pipes 37 are attached to the transport pipe 31.
The injection pipe 36 is detachably attached to this mounting pipe 37.
Let's go. Preferably, the injection pipe 36 has a spherical shape called a spray ball and has a plurality of injection holes, and has a structure in which the cleaning liquid is ejected toward the surrounding area. This injection pipe 3
6 always interferes with the rotation of the screw 32, so
Remove this and attach a blind cover (not shown) to the attachment tube 37.

Further, 40 is an opening/closing damper connected to the JJt outlet pipe 34.

In the above configuration, when cleaning, each mounting pipe 37 is
The pipe 36 is attached, and cleaning such as cleaning and sterilization is performed by squirting cleaning liquid at high pressure. In this case, the opening/closing damper 40 mentioned above may be omitted and the cleaning liquid may be discharged as is.

Alternatively, the opening/closing damper 40 is closed, the cleaning liquid is stored in the transport pipe 31, and then released, and this process is repeated. That is, when cleaning the reservoir, the shaft feed material that adheres to the blind spot during the injection pipe can be dissolved and discharged. In this case, water, medium-temperature water, or hot water may be used as the cleaning liquid, and a detergent may be mixed in if necessary.

Alternatively, as described above, it may be possible to perform only the holding wash (instead of washing first). In other words, when supplying the washing liquid, the injection pipe 36
Instead, for example, the cleaning liquid may be supplied from the supply pipe 33 through an appropriate supply pipe (not shown). Further, when washing the reservoir, the screw 32 may be rotated so that the inner wall of the transport pipe 31 and the screw 32 are simultaneously cleaned one time by the swirling flow.

Figures 5 to 7 show both the jet cleaning method using the jet pipe 36 and the reservoir cleaning method using the opening/closing damper 40, and both methods may be performed independently, or they may be combined. You can do it like this.

In the figure, reference numerals 41 and 42 indicate supporting hair rings of the screw 32.

Next, FIG. 8 shows a third embodiment. The screw feeder 45 of this embodiment is a combination of the first embodiment and the second embodiment, and consists of a transport pipe 31 and a screw 3.
The transport pipe 31 has an attachment pipe 3 to which the above-mentioned injection pipe 36 is attached.
7, and a damper 40 is attached to the discharge pipe 34,
The screw 3 consists of a drive shaft 6 and a cylindrical body 7 that fits into the drive shaft 6 and is provided with screw blades 8 for feeding on the outer periphery.The same parts as the curved brush 1 and the second embodiment are as follows. The same reference numerals are used to omit the explanation.

When cleaning the interior according to this embodiment, the screw blade 8 is taken out and cleaned in the manner described above. After taking out the screw blade 8, an injection Yl 36 is inserted, and the inside of the transport pipe is cleaned by the injection. In this case, the bearing portion 1 of the transport pipe 31. After removing the tI 5, a suitable blind lid (not shown) may be attached, and the opening/closing damper 40 may be closed to perform the above-mentioned reservoir washing.

〔Effect of the invention〕

The present invention has the following effects.

In the first invention, the screw is composed of a drive shaft and a cylindrical body fitted with the drive shaft and equipped with screw blades, and when the cylindrical body can be taken out, the screw blades can be taken out and cleaned, and the inside of the transport pipe can be cleaned. Cleaning can be done easily and reliably.

Further, in the second invention, that is, when the injection pipe is detachably attached to the transport pipe and cleaning is performed by jetting cleaning liquid from the injection pipe, it is not necessary to remove the screw.
Frequent daily cleaning can be performed, and by increasing the injection pressure, the stuck transport material ↑4 can be reliably removed.

In addition, when using the third invention, that is, the reservoir washing method, it is possible to dissolve the adhering transport material and discharge it.

Furthermore, when the first invention and the second or third invention are combined, the screw blades are taken out and washed, and the inside of the transport pipe is reliably and easily washed by spraying or pool washing overnight. can do.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is an overall vertical sectional view, FIG. 2 is a plan view thereof, FIG. 3 is an enlarged sectional view of a bearing member, and FIG. 4 is a sectional view taken along line I-1 in FIG. 3, and FIGS. 5 to 7 relate to the second embodiment,
Fig. 5 is an overall vertical sectional view, Fig. 6 is a plan view thereof, Fig. 7 is an enlarged sectional view of the injection pipe and its attachment pipe, and Fig. 8 is the third
An overall vertical sectional view of the embodiment, and FIG. 9 is a front view of a conventional screw feeder. i, 30.45 is screw feeder, 2°31.51
is a transport pipe, 3.32 is a screw 6 is a drive shaft, 7 is a cylinder body, 8 is a screw blade, 13 is a locking/disengaging mechanism, 14 is a key
15 is a bearing member, 34 is a discharge pipe, and 3G is a cleaning member. 'f+liquid injection pipe, 40 is an opening/closing damper.

Claims (6)

[Claims] (1) In a screw feeder, a screw is arranged in a transport pipe, and the supplied powder or other transport material is transported along the transport pipe by rotation of the screw. A screw feeder comprising a cylindrical body into which a screw blade is fitted and a screw blade is attached, an engagement/disengagement mechanism is provided between the two, and a bearing member for supporting a drive shaft tip is removably attached to the tip of a transport pipe. . (2) The screw feeder according to claim 1, wherein the engaging/disengaging mechanism has a drive shaft that is a prism, and a key having a half-moon cross section that fits into a gap between the cylindrical cylinder and the prism. (3) In a screw feeder in which a screw is disposed in a transport pipe and transport materials such as powder are transported along the transport pipe by rotation of the screw, a cleaning liquid injection pipe can be attached and removed at an appropriate location on the transport pipe. A screw feeder installed in (4) In a screw feeder in which a screw is arranged in a transport pipe and the supplied powder or other transport material is transferred along the transport pipe by rotation of the screw, the discharge pipe attached to the outlet side of the transport pipe has an open/close opening. A screw feeder characterized in that a valve is attached, and cleaning liquid supplied into a transport pipe is stored and discharged by opening and closing the valve. (5) The screw feeder according to claim 1, wherein the transport pipe is provided with a cleaning liquid injection pipe removably installed at an appropriate position. (6) The screw feeder according to claim 1, wherein an opening/closing valve is attached to the discharge pipe of the transport pipe, and the cleaning liquid supplied into the transport pipe is stored and discharged by opening and closing the valve.